There are green funds that include these kinds of companies to gain a sense of balance for the energy solution field. Recently there has been a lot of interest in China , since the country produces an enormous amount of emissions and this problem needs addressing. The politicians of China, thankfully, are now beginning to prioritize green projects.
If you are considering green investments, then you are thinking along the same lines as 90% of the big global investors, so there can be little doubt that now is the right time for a percentage of your portfolio to go green.
For more information, go to:
alternativeenergymutualfunds.org,
en.wikipedia.org